Vodacom is easily the worst company I've ever dealt with!!

I've been trying to cancel my cellphone contract with Vodacom since October last year yet every month since I'm still getting invoices & money taken out of my account. I've called their cancellation & customer care departments on numerous times (& they will have the recordings of those phone calls) yet earlier this month, I still received another invoice via email which will probably go off in my account the 1st of next month. I also sent an email to their customer care department trying to find a solutions while also sharing my disappointment in their service & also informing them that they've lost a client that have been using them for more than 20years... Only to get some automated response basically ignoring me. I've tried everything I can think of which got me to the point of this review with the hope I can get some assistance but no offense to your platform, I don't feel too optimistic about a positive outcome for me.